On the subject of lenses, glass has a tendency to be improved for scratch resistance, nonetheless it might get weighty—And that's why most sunglasses use lenses made from some form of plastic, e.g. nylon. Great sunglasses must not only deliver shade on your eyes, they also needs to give UVA https://sunglassesonlinestore.com/product/kingseven-new-design-aluminum-magnesium-sunglasses-men-polarized-square-driving-sun-glasses-male-eyewear-accessories-for-men/